NutriStack
Selenium and Sulforaphane, a synergy.
Sulforaphane and selenium act on the same antioxidant axis: sulforaphane induces the genes for selenium-dependent enzymes (thioredoxin reductase 1 and glutathione peroxidase 2), and selenium supplies the selenocysteine those enzymes need to function. In human hepatocyte cell studies the combination synergistically increased thioredoxin reductase 1 protein (about 5.5-fold), activity (about 13-fold) and mRNA (about 6.5-fold), and protected cells from oxidative damage more than either alone. Practically, taking sulforaphane against a background of sufficient (not deficient) selenium lets the upregulated selenoenzymes actually be built. A separate line of work shows sulforaphane can also bind and accelerate degradation of selenoprotein P, the body's selenium transport protein, so the relationship is mostly favorable synergy with a minor caveat to avoid frank selenium deficiency.
One pair, every claim cited. The two substances, the type, the mechanism, the recommendation, and the primary literature.
Same shape as the other 1,729 pairs in the public database.
From the interaction database
What the row says.
Every entry follows the same shape: what is happening, the mechanism, the recommendation, and the primary literature.
At a glance
- Substances
- Selenium and Sulforaphane
- Pair type
- Synergy
- Evidence (highest tier)
- Emerging
- Source citations
- 3 sources
- Stack Score effect
- +2 to your Stack Score (per scored synergy row).
- Scope
- Supplement × Supplement
- Last verified
- May 30, 2026
Synergy · Emerging evidence
Synergy
What is happening. Sulforaphane and selenium act on the same antioxidant axis: sulforaphane induces the genes for selenium-dependent enzymes (thioredoxin reductase 1 and glutathione peroxidase 2), and selenium supplies the selenocysteine those enzymes need to function. In human hepatocyte cell studies the combination synergistically increased thioredoxin reductase 1 protein (about 5.5-fold), activity (about 13-fold) and mRNA (about 6.5-fold), and protected cells from oxidative damage more than either alone. Practically, taking sulforaphane against a background of sufficient (not deficient) selenium lets the upregulated selenoenzymes actually be built. A separate line of work shows sulforaphane can also bind and accelerate degradation of selenoprotein P, the body's selenium transport protein, so the relationship is mostly favorable synergy with a minor caveat to avoid frank selenium deficiency.
Mechanism. Sulforaphane is an Nrf2 activator that upregulates antioxidant enzymes, including the selenium-dependent selenoproteins thioredoxin reductase 1 (TrxR1) and glutathione peroxidase 2 (GPx2). Selenium is the obligatory cofactor incorporated as selenocysteine into these enzymes. Sulforaphane drives transcription (mRNA up several fold) while selenium acts at the translational level and stabilizes the sulforaphane-induced mRNA, so the two combine to raise selenoprotein protein, activity, and message beyond either agent alone. Adequate selenium availability is therefore required for sulforaphane's induced selenoenzyme defenses to be functional.
Recommendation. No need to dose together at the same minute; both contribute to a steady antioxidant-enzyme pool. Ensure selenium intake is adequate (roughly 55 to 100 mcg/day for adults from diet plus supplement; total long-term intake should stay under about 400 mcg/day to avoid selenosis) so sulforaphane-induced selenoenzymes can be synthesized. Do not megadose selenium expecting added benefit. If you already eat selenium-rich foods (Brazil nuts, seafood), routine extra selenium is usually unnecessary alongside sulforaphane.
Minimum separation. None required
Sources (3)
- Zhang et al., Synergy between sulforaphane and selenium in the up-regulation of thioredoxin reductase and protection against hydrogen peroxide-induced cell death in human hepatocytes, Food Chemistry, 2012
- Hintze et al., Synergy between sulforaphane and selenium in the induction of thioredoxin reductase 1 requires both transcriptional and translational modulation, Carcinogenesis, 2003
- Ye et al., Sulforaphane decreases serum selenoprotein P levels through enhancement of lysosomal degradation independent of Nrf2, Communications Biology, 2023
Stack Score
How this pair moves the number.
Effect on the composite score
If both Selenium and Sulforaphane are in the same stack, this pair applies +2 to your Stack Score (per scored synergy row).
The full algorithm, the clamping rules, and four worked stacks are documented at /methodology/stack-score.
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